#include<stdio.h>
static int para_change(int para1);
int main(void)
{
    int para = 0x111;
    printf("Before change %d\n", para);
    para_change(para);
    printf("After change %d\n", para);
    return 0;
}
static int para_change(int para1)
{
    int ret_val;
    para1 = 0x3456789;
    ret_val = para1;
    return ret_val;
}